bzr push into mysql-5.1 branch (sergey.vojtovich:3634 to 3635)

[Sergey Vojtovich]

 3635 Sergey Vojtovich	2011-06-03 [merge]
      Merge.

    added:
      mysql-test/r/archive_debug.result
      mysql-test/t/archive_debug.test
    modified:
      storage/archive/azio.c
      storage/archive/ha_archive.cc
 3634 Davi Arnaut	2011-05-30
      Bug#12563279: REGRESSION IN HANDLING PRE-4.1 AUTHENTICATION PACKET
      
      The problem is that clients implementing the 4.0 version of the
      protocol (that is, mysql-4.0) do not null terminate a string
      at the end of the authentication packet. These clients denote
      the end of the string with the end of the packet.
      
      Although this goes against the documented (see MySQL Internals
      ClientServer Protocol wiki) description of the protocol, these
      old clients still need to be supported.
      
      The solution is to support the documented and actual behavior
      of the clients. If a client is using the pre-4.1 version of
      the protocol, the end of a string in the authentication packet
      can either be denoted with a null character or by the end of
      the packet. This restores backwards compatibility with old
      clients implementing either the documented or actual behavior.
     @ sql/password.c
        The scrambled message, as provided by the user, might not be
        properly null terminated. If this is the case, uninitialized
        memory past the end of the buffer could theoretically be
        accessed. To ensure that this is never the case, copy the
        scrambled message over to a null terminated auxiliar buffer.
     @ sql/sql_connect.cc
        Use different execution paths to read strings depending on the
        protocol being used. If version 4.0 of the protocol is used,
        end of string can be denoted with a NUL character or by the
        end of the packet.
        
        If there are not enough bytes left after the current position
        of the buffer to satisfy the current string, the string is
        considered to be empty. This is required because old clients
        do not send the password string field if the password is empty.

    modified:
      sql/password.c
      sql/sql_connect.cc
=== added file 'mysql-test/r/archive_debug.result'
--- a/mysql-test/r/archive_debug.result	1970-01-01 00:00:00 +0000
+++ b/mysql-test/r/archive_debug.result	2011-05-18 10:01:43 +0000
@@ -0,0 +1,12 @@
+#
+# BUG#12402794 - 60976: CRASH, VALGRIND WARNING AND MEMORY LEAK
+#                       WITH PARTITIONED ARCHIVE TABLES
+#
+CREATE TABLE t1(a INT) ENGINE=ARCHIVE;
+INSERT INTO t1 VALUES(1);
+SET SESSION debug='d,simulate_archive_open_failure';
+CHECK TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	error	Corrupt
+SET SESSION debug=DEFAULT;
+DROP TABLE t1;

=== added file 'mysql-test/t/archive_debug.test'
--- a/mysql-test/t/archive_debug.test	1970-01-01 00:00:00 +0000
+++ b/mysql-test/t/archive_debug.test	2011-05-18 10:01:43 +0000
@@ -0,0 +1,13 @@
+--source include/have_archive.inc
+--source include/have_debug.inc
+
+--echo #
+--echo # BUG#12402794 - 60976: CRASH, VALGRIND WARNING AND MEMORY LEAK
+--echo #                       WITH PARTITIONED ARCHIVE TABLES
+--echo #
+CREATE TABLE t1(a INT) ENGINE=ARCHIVE;
+INSERT INTO t1 VALUES(1);
+SET SESSION debug='d,simulate_archive_open_failure';
+CHECK TABLE t1;
+SET SESSION debug=DEFAULT;
+DROP TABLE t1;

=== modified file 'storage/archive/azio.c'
--- a/storage/archive/azio.c	2009-11-17 12:14:27 +0000
+++ b/storage/archive/azio.c	2011-05-18 10:01:43 +0000
@@ -114,6 +114,15 @@ int az_open (azio_stream *s, const char 
 
   errno = 0;
   s->file = fd < 0 ? my_open(path, Flags, MYF(0)) : fd;
+  DBUG_EXECUTE_IF("simulate_archive_open_failure",
+  {
+    if (s->file >= 0)
+    {
+      my_close(s->file, MYF(0));
+      s->file= -1;
+      my_errno= EMFILE;
+    }
+  });
 
   if (s->file < 0 ) 
   {

=== modified file 'storage/archive/ha_archive.cc'
--- a/storage/archive/ha_archive.cc	2011-05-06 08:03:02 +0000
+++ b/storage/archive/ha_archive.cc	2011-05-18 10:01:43 +0000
@@ -1586,11 +1586,12 @@ int ha_archive::check(THD* thd, HA_CHECK
   azflush(&(share->archive_write), Z_SYNC_FLUSH);
   pthread_mutex_unlock(&share->mutex);
 
+  if (init_archive_reader())
+    DBUG_RETURN(HA_ADMIN_CORRUPT);
   /*
     Now we will rewind the archive file so that we are positioned at the 
     start of the file.
   */
-  init_archive_reader();
   read_data_header(&archive);
   while (!(rc= get_row(&archive, table->record[0])))
     count--;

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